EP0880649A4 - RECIPROCATING PUMP DEVICE WITH DIRECT MAGNETIC DRIVE, ASSOCIATED WITH INTEGRAL PRESSURE DETECTION AND METHOD THEREOF - Google Patents

RECIPROCATING PUMP DEVICE WITH DIRECT MAGNETIC DRIVE, ASSOCIATED WITH INTEGRAL PRESSURE DETECTION AND METHOD THEREOF

Info

Publication number
EP0880649A4
EP0880649A4 EP97904001A EP97904001A EP0880649A4 EP 0880649 A4 EP0880649 A4 EP 0880649A4 EP 97904001 A EP97904001 A EP 97904001A EP 97904001 A EP97904001 A EP 97904001A EP 0880649 A4 EP0880649 A4 EP 0880649A4
Authority
EP
European Patent Office
Prior art keywords
piston assembly
drive
chamber
level
driving force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97904001A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0880649A1 (en
Inventor
Thomas R Tullsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dionex Corp
Original Assignee
Dionex Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dionex Corp filed Critical Dionex Corp
Publication of EP0880649A1 publication Critical patent/EP0880649A1/en
Publication of EP0880649A4 publication Critical patent/EP0880649A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0407—Force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet

Definitions

  • the spring augmented solenoid pumps cause several operational problems.
  • the coils of the return spring may rub against a piston shaft or other exposed surfaces during operation to substantially increase friction and severely hamper operation thereof.
  • the spring force acting on the piston must be overcome by the electromagnetic force driving the piston in the opposite direction during the during the push or flush stroke. This force imbalance tends to cause erratic fluid flow so that the pump flow rate is neither substantially constant nor smooth.
  • the refill or pull stroke may be too fast such that an internal cushion or bumper is necessary to absorb and cushion contact as the spring fully withdraws the piston from the chamber.
  • the method includes the steps of A) retaining the piston assembly at a first position along the path toward and away from the chamber in the presence of a first seal stiction formed between the seal and the piston assembly. This retainment is accomplished by applying a driving force at a first level to the piston assembly in a first direction opposite the hydraulic pressure force of the pumped fluid acting thereon in an opposite second direction.
  • the next step includes B) incrementally increasing or decreasing the driving force from the first level to a second level at which the piston assembly just overcomes the first seal stiction.
  • the piston assembly breaks the first seal stiction, and measurably moves in either the first direction or the second direction along the path away from the first position.
  • a drive current is applied to the solenoid coil in one direction to drive the piston assembly along the path in the first direction, and in a reverse direction to drive the piston assembly along the path in the opposite second direction.
  • the generated drive force applied to the piston assembly is proportionate to the drive current applied to the coil.
  • the drive force generally must be directed in the second direction combining the drive force with the hydraulic force to oppose the weight of the piston assembly.
  • the drive force may only need to be reduced, still directed in the second direction, from the drive force level required to retain the piston assembly relative chamber 13.
  • the drive force may have to be reversed in direction (i.e., in the first direction) .
  • the calculating step further includes the step of multiplying the sum of the second current and the first current by the empirical constant (C) to convert the current summation into the hydraulic pressure.
  • Another step includes subtracting the weight of the piston assembly from the hydraulic force value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Measuring Fluid Pressure (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP97904001A 1996-02-14 1997-01-28 RECIPROCATING PUMP DEVICE WITH DIRECT MAGNETIC DRIVE, ASSOCIATED WITH INTEGRAL PRESSURE DETECTION AND METHOD THEREOF Withdrawn EP0880649A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US60109296A 1996-02-14 1996-02-14
PCT/US1997/001286 WO1997030288A2 (en) 1996-02-14 1997-01-28 Magnetic direct drive reciprocating pump apparatus and method with integral pressure sensing
US601092 2003-06-20

Publications (2)

Publication Number Publication Date
EP0880649A1 EP0880649A1 (en) 1998-12-02
EP0880649A4 true EP0880649A4 (en) 2004-05-26

Family

ID=24406194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97904001A Withdrawn EP0880649A4 (en) 1996-02-14 1997-01-28 RECIPROCATING PUMP DEVICE WITH DIRECT MAGNETIC DRIVE, ASSOCIATED WITH INTEGRAL PRESSURE DETECTION AND METHOD THEREOF

Country Status (5)

Country Link
EP (1) EP0880649A4 (ja)
JP (1) JP3248728B2 (ja)
AU (1) AU697945B2 (ja)
CA (1) CA2245889C (ja)
WO (1) WO1997030288A2 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856917B4 (de) * 1998-12-10 2008-06-05 Robert Bosch Gmbh Pumpenaggregat
JP5277027B2 (ja) * 2009-03-11 2013-08-28 Ｊｘ日鉱日石エネルギー株式会社 微小流量液体ポンプ制御装置
JP6229704B2 (ja) * 2015-10-01 2017-11-15 トヨタ自動車株式会社 燃料ポンプ
DE102021103389A1 (de) 2021-02-12 2022-08-18 Dionex Softron Gmbh Verfahren und Systeme zum Bestimmen einer Charakteristik eines von einer Pumpe zugeführten Fluids

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61200386A (ja) * 1985-02-28 1986-09-04 Yamatake Honeywell Co Ltd 電磁ポンプ
JPS62163305A (ja) * 1986-01-14 1987-07-20 Matsushita Electric Works Ltd 可動体の構造
JPS63243472A (ja) * 1987-03-27 1988-10-11 Takatsuki Denki Seisakusho:Kk 可動磁石式ダイヤフラムポンプ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3483959B2 (ja) * 1994-10-14 2004-01-06 Ｔｄｋ株式会社 磁石可動型リニアアクチュエータ及びポンプ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61200386A (ja) * 1985-02-28 1986-09-04 Yamatake Honeywell Co Ltd 電磁ポンプ
JPS62163305A (ja) * 1986-01-14 1987-07-20 Matsushita Electric Works Ltd 可動体の構造
JPS63243472A (ja) * 1987-03-27 1988-10-11 Takatsuki Denki Seisakusho:Kk 可動磁石式ダイヤフラムポンプ

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0110, no. 28 (M - 557) 27 January 1987 (1987-01-27) *
PATENT ABSTRACTS OF JAPAN vol. 0120, no. 03 (E - 570) 7 January 1988 (1988-01-07) *
PATENT ABSTRACTS OF JAPAN vol. 0130, no. 33 (M - 789) 25 January 1989 (1989-01-25) *

Also Published As

Publication number Publication date
AU1842197A (en) 1997-09-02
WO1997030288A8 (en) 2004-07-01
JP3248728B2 (ja) 2002-01-21
JPH11506185A (ja) 1999-06-02
EP0880649A1 (en) 1998-12-02
AU697945B2 (en) 1998-10-22
CA2245889C (en) 2001-04-24
CA2245889A1 (en) 1997-08-21
WO1997030288A2 (en) 1997-08-21

Similar Documents

Publication Publication Date Title
EP0392784B1 (en) Electromagnetic valve utilizing a permanent magnet
US3894817A (en) Oscillatory armature piston pump
JP2685869B2 (ja) 弁ユニット
US2536813A (en) Magnetic drive
US4874299A (en) High precision pump
EP1208288B1 (en) Dc centering of free piston machines
EP0361927A1 (en) Pump control method and poppet valve therefor
EP0076726A2 (en) Stirling cycle cryogenic cooler
US6168387B1 (en) Reciprocating pump with linear displacement sensor
US20060119350A1 (en) Apparatus for determining free piston position and an apparatus for controlling free piston position
KR20100002176U (ko) 고효율 유체펌프
CA2469058A1 (en) Reciprocating fluid pump employing reversing polarity motor
AU697945B2 (en) Magnetic direct drive reciprocating pump apparatus and method with integral pressure sensing
US20180230992A1 (en) Linear pumping system and methods for controlling the same
CN101042126A (zh) 直线压缩机组件
US3603706A (en) Electromagnetic micropump for processing aggressive liquid substances
US20190353147A1 (en) Injection pump
GB1317967A (en) Null adjuster for magnetically operated torque motors
US8241019B2 (en) Pump element and pump having such a pump element
JP3529156B2 (ja) ムービングコイル駆動型ニードル弁
JP2001006928A (ja) 流量調節弁
NL1018567C2 (nl) Magnetisch aangedreven pomp.
JPS6219617B2 (ja)
JP4570343B2 (ja) 電磁式ポンプ
US3018735A (en) Electromagnetic vibratory pump

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980818

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL

D17D Deferred search report published (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20040415

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040630